I like to suggest having a Batch Macro Container (besides the existing Container) which acts as a Batch Macro within a Workflow and is stored within the Workflow.
I understand that having a batch macro available as a separate tool can be very powerful and reduces redundant work. However, very often Batch Macros are set up for a specific workflow only and are of no use for other workflows. The Creation of a Batch Macro in a container will significantly reduce the time to deploy a batch macro and keeps the Macro folder clean of one-time Batch Macros.
Attached a picture of how this could look like
Thanks
Manuel